Patent GB-229660-A (GB)
Title: Improvements in or relating to record-card-controlled statistical machines
Filed: 1925-02-17
Abstract: 229,660. British Tabulating Machine Co., Ltd., (Assignees of Peirce, J. R.). Feb. 18, 1924, [Convention date]. Record-controlled type-bar machines; hammerimpression arrangements.-Statistical machines are provided with type-bars, which are moved synchronously with the card-feed, differentially arrested when a perforation comes under a brush, and connected directly and operatively to the card-reading mechanism which reads the cards in motion, and accumulating mechanism is operatively connected to the type-bars during their return strokes for item-accumulating or during their forward strokes at total-printing. The cards are run through the machine with the O perforation points leading, and type-bars 103, Figs. 2, 8, and 9, are moved upwards synchronously with the card feed by means of sliding cross-bars 40, 41, 42 connected together by a member 44, driven by linkage 45 and cam 46, and connected with the type-bars by springs 48. Upon downward movement of member 44, cross bar 42 engages shoulders 49 on the type-bars and upon upward movement, each type-bar follows the cross-bars until a perforation in the appropriate column comes under its brush, whereby a magnet 71 is energized to release a toothed member 70 which thereupon arrests a rack 80 rigid on the type-bar. The platen 51 and paper-feed 52, Fig. 3, are of the usual form, and for striking the type at the printing line plungers 55 are struck by hammers 56 impelled by springs 57 and tripped by members 59, 59a, and 60, and, for printing zeros to the right of the significant figures, by members 59<b>. 58 is a hammer relatching bail. There is a pair of magnets 71 to each column on the card, and each magnet has an armature member 72 pivoted at 73, and having a hook portion 74 normally retaining a spring-pressed detent 75 carrying the toothed member 79. At a certain time after the type-bars have been arrested differentially, the detents 79 are removed to the left by a universal bail 92, and the type-bars are locked by pawls 82, Fig. 8, released by a bail 84, links 85, 86, and cam 87 on the main shaft 13. Immediately a detent 75 moves to the right a spring-pressed slide 89 follows it and opens contacts 88 in the circuit of the particular brush. This prevents arcing at the brushes, these slides being restored by shoulders 91<a> on the detents 75. For itemaccumulating, each type-bar carries, by a pin- and-slot connection 104, a rack 102 held by a spring 105 in its lowermost position against a stop 106 on the type-bar. During the downward return movement of the type-bars the accumulator wheels 101, having twenty teeth and two transfer lugs 107, are placed in mesh with the racks 102 and so accumulate the items. Just before the type-bars move upwards, a cam 116 rocks a lever 119, Fig. 3, clockwise. about its pivot 120. This lever 119 has two extensions carrying pins 121, 122, of which 122 now engages with the right-hand notch, Fig. 2, of a bifurcated T-lever 123 attached to a lever 124 having a pin-and-slot connection 126 with a cambar 127. Thus as the type-bars begin to move up, the clockwise, rocking of the lever 119 pulls the cam-bar 127 down so that a cam 128 thereon rocks a member 130 anti-clockwise about its pivot 131, thereby withdrawing the accumulator wheels, the shaft 132 of which is on the member 130. During the downward movement of the type-bars the cam bar is raised, allowing the accumulator wheels to engage the racks 102. To print a total, the total-key 149, Fig. 3, rigid with a cam-plate 150 is pushed in so that by means of arms 153 and 155 a link 159, pivoted to the T-lever 123, is moved to the left. This disengages the right-hand notch of lever 123 from the pin 122, and engages the left-hand notch with pin 121 as shown in Fig. 3, so that now, as the type-bars begin to move up, the clockwise rocking of lever 119 raises the pin 121 and the cam bar 127 so that the accumulator wheels are in mesh with the racks 102, thereby transmitting the total to the type-bars; and as the latter move down the cam-bar 127 is lowered and disengages the accumulator, which thus remains zeroized. The upper parts of the ends of the transfer books 108 coact with the lugs 107 to arrest the accumulator wheels at zero. Specification 215,497, [Class 106 (i), Calculating &c.], is referred to. The, Specification as open to inspection under Sect. 91 (3) (a) states also that code cards such as the Peirce code cards may be used instead of the usual Hollerith cards, and that sub-totals may be printed. This subject-matter does not appear in the Specification as accepted.